/*
* Copyright (c) 2009 Jiri Svoboda
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup kbdgen generic
* @brief Generic scancode parser.
* @ingroup kbd
* @{
*/
/** @file
*/
#ifndef KBD_GSP_H_
#define KBD_GSP_H_
#include <adt/hash_table.h>
enum {
GSP_END = -1, /**< Terminates a sequence. */
GSP_DEFAULT = -2 /**< Wildcard, catches unhandled cases. */
};
/** Scancode parser description */
typedef struct {
/** Transition table, (state, input) -> (state, output) */
hash_table_t trans;
/** Number of states */
int states;
} gsp_t;
/** Scancode parser transition. */
typedef struct {
link_t link; /**< Link to hash table in @c gsp_t */
/* Preconditions */
int old_state; /**< State before transition */
int input; /**< Input symbol (scancode) */
/* Effects */
int new_state; /**< State after transition */
/* Output emitted during transition */
unsigned out_mods; /**< Modifier to emit */
unsigned out_key; /**< Keycode to emit */
} gsp_trans_t;
extern void gsp_init(gsp_t *);
extern int gsp_insert_defs(gsp_t *, const int *);
extern int gsp_insert_seq(gsp_t *, const int *, unsigned, unsigned);
extern int gsp_step(gsp_t *, int, int, unsigned *, unsigned *);
#endif
/**
* @}
*/